*{margin: 0px; padding: 0px}
ul,li,ol {list-style-type: none}
#content{width: 60%; height: 60%; top: 20%; left: 20%; position: absolute; border: 1px solid honeydew; overflow: hidden}
.content-wrap{width: 100%; height: 100%; position: relative}
.content-wrap >li{width: 100%; height: 100%; position: relative;  float: left}
li:nth-child(2){background: #9BCD9B}
li:nth-child(3){background: yellow}
button{width: 100px; height: 50px}
.button{position: absolute; bottom: 0}